Dark Current Patents (Class 348/243)
  • Patent number: 10455172
    Abstract: Conventional image sensors cannot generate highly-accurate correction values in a short time.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: October 22, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Hirokazu Shimizu
  • Patent number: 10455227
    Abstract: An image sensor includes a pixel array including a plurality of pixels, an analog-to-digital converter having a first counter for converting an analog signal into a digital signal, and an output buffer having a first memory. A first counter test result value generated as a test result for the first counter is stored in the first memory in a test mode. The output buffer outputs the first counter test result value from the first memory to an outside of the output buffer in response to a first selection signal. The output buffer further includes a reset logic circuit for resetting the first memory depending on whether the first counter test result value is output or not. The plurality of pixels generate the analog signal in response to incident light.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: October 22, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yun-Hong Kim, Hyeok-Jong Lee, Hee-Sung Chae
  • Patent number: 10446595
    Abstract: A solid-state imaging device includes a photoelectric converter including a plurality of light receiving elements arranged along one direction in correspondence with each color of received light, each light receiving element generating an electric charge corresponding to an amount of received light, an electric charge storage unit including a plurality of capacitors storing the electric charges generated by the respective light receiving elements, and a signal processing unit configured to process each of the electric charges stored by the plurality of capacitors as a signal. The electric charge storage unit is disposed so as to oppose the signal processing unit across the photoelectric converter.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: October 15, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuuya Miyoshi, Tohru Kanno
  • Patent number: 10425603
    Abstract: Systems and methods are disclosed herein to detect pixels exhibiting anomalous behavior in captured image frames. In some examples, temporal anomalous behavior may be identified, such as flickering pixels exhibiting large magnitude changes in pixel values that vary rapidly from frame-to-frame. In some examples, spatial anomalous behavior may be identified, such as pixels exhibiting values that deviate from an expected linear response in comparison with other neighbor pixels.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: September 24, 2019
    Assignee: FLIR Systems, Inc.
    Inventors: Joseph Kostrzewa, Nicholas Hogasten, Theodore R. Hoelter, Scott McNally
  • Patent number: 10397510
    Abstract: An electronic device includes an image signal processor and a memory. The image signal processor receives a signal of a first code value that corresponds to an active pixel included in an active area, calculates a correction value based on a second code value associated with a first area and a third code value associated with a second area, and calculates an output code value based on the first code value and the correction value. The first area and the second area are different from the active area. The correction value includes a component of the third code value in proportion to a distance between the active pixel and the first area and includes a component of the second code value in proportion to a distance between the active pixel and the second area.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: August 27, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Moo Young Kim, Kyoungmin Koh, Kyuil Kim
  • Patent number: 10356347
    Abstract: A digital imaging system and method for correcting errors in the digital imaging system, the digital imaging system having an image sensor, a readout apparatus for reading out the image sensor, wherein a dark current image is captured using the image sensor and the readout apparatus, and a processor comprising hardware wherein the processor is configured to perform the method comprising: generating a Fourier transform by means of a Fourier transformation on the basis of the image data of the dark current image; storing data which describe the Fourier transform; back-transforming the Fourier transform by subjecting the saved data to Fourier transformation and generating a corrective image from the back-transformed data, and correcting image errors in the digital imaging system in another image captured using the digital imaging system by offsetting image data from the captured image with image data from the corrective image.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: July 16, 2019
    Assignee: OLYMPUS SOFT IMAGING SOLUTIONS GMBH
    Inventor: Juergen Tuempner
  • Patent number: 10354577
    Abstract: A technique for masking a non-functioning pixel in a display screen includes receiving pixel values for driving pixels on the display screen with an image, identifying a sub-set of the pixel values associated with surrounding pixels that are adjacent to the non-functioning pixel in the display screen, and adjusting the pixel values of the sub-set to increase brightness of the surrounding pixels to compensate for lost brightness due to the non-functioning pixel to thereby mask visual perception of the non-functioning pixel.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: July 16, 2019
    Assignee: X Development LLC
    Inventors: Mary Lou Jepsen, Nicholas C. Loomis, Behnam Bastani, Carlin Vieri, Colin Braley, Stuart C. B. Abercrombie
  • Patent number: 10327631
    Abstract: Disclosed herein are methods and systems for aligning swept-source optical coherence tomography (SS-OCT) spectral interferograms to a reference spectral interferogram based on signal information (e.g., amplitude or phase) at a fixed-pattern noise location to reduce residual fixed-pattern noise and improve the phase stability of SS-OCT systems.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: June 25, 2019
    Assignee: Oregon Health & Science University
    Inventors: David Huang, Gangjun Liu
  • Patent number: 10321075
    Abstract: Provided is an imaging apparatus including a pixel array in which a plurality of pixels are arranged in a matrix, each of the pixels comprising a photoelectric conversion portion. The pixel array includes a first pixel configured to output an imaging signal in accordance with an incident light and a second pixel configured to output a correction signal used for correcting the imaging signal. The second pixel outputs the correction signal after performing a first reset performed in a state where a first bias voltage is applied to the photoelectric conversion portion of the second pixel and a second reset performed in a state where a second bias voltage that is different from the first bias voltage is applied to the photoelectric conversion portion.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: June 11, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tasuku Kaneda, Kei Ochiai, Akira Ohtani
  • Patent number: 10321076
    Abstract: A partially attenuating shutter may be used to identify and reduce fixed pattern noise (FPN) associated with imaging devices. In one example, a system includes an image capture component configured to capture images in response to incident radiation from a scene along an optical path. The system includes a shutter configured to attenuate a first portion of the incident radiation and permit a second portion of the incident radiation to pass. The system also includes an actuator configured to translate the shutter between an open position out of the optical path, and a closed position in the optical path between the scene and the image capture component. The system also includes a processor configured to determine a plurality of FPN correction terms using images captured by the image capture component while the shutter is in the open and closed positions. Related systems and methods are also provided.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: June 11, 2019
    Assignee: FLIR Systems, Inc.
    Inventors: Sam Grigorian, Nicholas Högasten, Pierre Boulanger
  • Patent number: 10277855
    Abstract: An image sensing device includes: a plurality of pixels; and an AD converter that compares a pixel signal output from the plurality of pixels with a slope voltage having a temporally variable potential so as to perform AD conversion on the pixel signal, and switching is performed between a first mode and a second mode according to an imaging condition, the first mode being a mode in which the pixel signal is AD converted by selecting one from among a plurality of slope voltages and comparing the pixel signal with the selected slope voltage, and the second mode being a mode in which the pixel signal is AD converted by comparing the pixel signal with a predetermined slope voltage.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: April 30, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Mie Ishii
  • Patent number: 10249656
    Abstract: An image sensor may include an array of image pixels coupled to analog-to-digital conversion circuitry formed from pinned photodiode charge transfer circuits. Majority charge carriers for the pinned photodiodes in the charge transfer circuits may be electrons for photodiode wells formed from n-type doped regions and may be holes for photodiode formed from p-type doped regions. Pinned photodiodes may be used for charge integration onto a capacitive circuit node. Pinned photodiodes may also be used for charge subtraction from a capacitive circuit node. Comparator circuitry may be used to determine digital values for the pixel output levels in accordance with single-slope conversion, successive-approximation-register conversion, cyclic conversion, and first or second order delta-sigma conversion techniques. The array of image pixels used for imaging may have a conversion mode wherein at least a portion of the pixel circuitry in the array are operated similar to the charge transfer circuits.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: April 2, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Roger Panicacci
  • Patent number: 10250830
    Abstract: A solid-state imaging device includes: a valid area including pixels that are not shielded from light; a first light-blocked area and a second light-blocked area each including pixels that are shielded from light; an analog-to-digital converting unit to convert the electric charge accumulated by the pixels belonging to the first light-blocked area, the valid area, and the second light-blocked area, to image data at a time; a signal reading unit to read light-blocked data obtained from the first light-blocked area and the second light-blocked area, and valid data obtained from the valid area, in units of pixels; a reference black level estimating unit to estimate a reference black level of the light-blocked data; and a level correction unit to correct, based on the estimated reference black level, a size of the valid data obtained simultaneously with the light-blocked data used in estimating the reference black level.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: April 2, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinji Sakaguchi, Tohru Kanno
  • Patent number: 10250829
    Abstract: An image processing apparatus comprises: a first circuit; and a second circuit connected to the first circuit; wherein the first circuit receives image data obtained by an image sensor including a vertical light-shielded region and an effective region, and applies, on image data of a first region which is a portion of the effective region of the image data, predetermined image processing by using image data of the vertical light-shielded region, the first circuit sets a second region and consecutively transmits to the second circuit image data of the vertical light-shielded region and unprocessed image data of the second region, and the second circuit receives the transmitted image data, and applies the predetermined image processing to the received image data by using the received image data of the vertical light-shielded region.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: April 2, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Daisuke Wakamiya
  • Patent number: 10192922
    Abstract: An image sensor may include an array of image pixels coupled to analog-to-digital conversion circuitry formed from pinned photodiode charge transfer circuits. Majority charge carriers for the pinned photodiodes in the charge transfer circuits may be electrons for photodiode wells formed from n-type doped regions and may be holes for photodiode formed from p-type doped regions. Pinned photodiodes may be used for charge integration onto a capacitive circuit node. Pinned photodiodes may also be used for charge subtraction from a capacitive circuit node. Comparator circuitry may be used to determine digital values for the pixel output levels in accordance with single-slope conversion, successive-approximation-register conversion, cyclic conversion, and first or second order delta-sigma conversion techniques. The array of image pixels used for imaging may have a conversion mode wherein at least a portion of the pixel circuitry in the array are operated similar to the charge transfer circuits.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: January 29, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Roger Panicacci
  • Patent number: 10175452
    Abstract: A microcomputer controls accumulation of a signal by an AF sensor based on an AF area corresponding to a subject among a plurality of regions in the AF sensor that corresponds to each of AF areas. A setting unit sets the region corresponding to a position of a subject that should be in focus among the plurality of regions. A focus detection unit carries out focus detection based on the signal acquired from the control, the control being based on a light reception amount in a reference region set by the setting unit.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: January 8, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuyuki Suzuki
  • Patent number: 10129493
    Abstract: A radiation imaging apparatus, comprising a sensor array, a readout unit, for reading out image data from the sensor array, which includes a first mode of reading out image data in a first period and a second mode of reading out image data in a second period shorter than the first period, a holding unit and a controlling unit, wherein, after irradiation to the sensor array is complete, the controlling unit performs first control which causes the holding unit to hold image data read out in the second mode while the sensor array is not irradiated, as offset data for the second mode, and then, performs second control which causes the holding unit to hold image data read out in the first mode while the sensor array is not irradiated, as offset data for the first mode.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: November 13, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takuya Ryu, Tomoyuki Yagi
  • Patent number: 10104321
    Abstract: An image processing system for an image sensor includes an analog-to-digital conversion (ADC) unit that performs ADC on pixel signals, thereby generating digital pixel signals; a correlated double sampling (CDS) unit that performs CDS on the digital pixel signals; a black level estimation (BLE) unit that generates a negative offset voltage according to dark voltage obtained from CDS performed on estimating optical black pixels (OBPs) of a pixel array, the negative offset voltage being subtracted from the pixel signals before feeding the pixel signals to the ADC unit; and a black level compensation (BLC) unit that performs BLC on active pixels sensors (APSs) and the compensating OBPs of the pixel array.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: October 16, 2018
    Assignee: Himax Imaging Limited
    Inventors: Youngchul Sohn, Kwangoh Kim, Hack soo Oh
  • Patent number: 10038868
    Abstract: The present invention provides a technique for achieving higher picture quality of a captured image by reducing noise which occurs at the time of resetting in a solid-state image sensing device and the like. A pixel array in a solid-state image sensing device includes a plurality of pixels and includes an OB pixel region and an effective pixel region. The solid-state image sensing device has a signal processing unit outputting a pixel signal of each of the pixels in the effective pixel region on the basis of the signal level of a signal output from each of the pixels. The solid-state image sensing device obtains a signal without applying a reset signal to each of the pixels in the OB pixel region, obtains the difference between the signal and a signal of a pixel in the effective pixel region, and outputs an image signal.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: July 31, 2018
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Shunsuke Okura, Fukashi Morishita
  • Patent number: 10020339
    Abstract: A solid-state imaging device includes a pixel having a photoelectric conversion element which generates a charge in response to incident light, a first transfer gate which transfers the charge from the photoelectric conversion element to a charge holding section, and a second transfer gate which transfers the charge from the charge holding section to a floating diffusion. The first transfer gate includes a trench gate structure having at least two trench gate sections embedded in a depth direction of a semiconductor substrate, and the charge holding section includes a semiconductor region positioned between adjacent trench gate sections.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: July 10, 2018
    Assignee: Sony Semiconductor Solutions Corporation
    Inventor: Takahiro Kawamura
  • Patent number: 10001406
    Abstract: An image sensor may include an array of image pixels coupled to analog-to-digital conversion circuitry formed from pinned photodiode charge transfer circuits. Majority charge carriers for the pinned photodiodes in the charge transfer circuits may be electrons for photodiode wells formed from n-type doped regions and may be holes for photodiode formed from p-type doped regions. Pinned photodiodes may be used for charge integration onto a capacitive circuit node. Pinned photodiodes may also be used for charge subtraction from a capacitive circuit node. Comparator circuitry may be used to determine digital values for the pixel output levels in accordance with single-slope conversion, successive-approximation-register conversion, cyclic conversion, and first or second order delta-sigma conversion techniques. The array of image pixels used for imaging may have a conversion mode wherein at least a portion of the pixel circuitry in the array are operated similar to the charge transfer circuits.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: June 19, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Roger Panicacci
  • Patent number: 10002897
    Abstract: Provided is a solid-state imaging device including a lamination-type backside illumination CMOS (Complementary Metal Oxide Semiconductor) image sensor having a global shutter function. The solid-state imaging device includes a separation film including one of a light blocking film and a light absorbing film between a memory and a photo diode.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: June 19, 2018
    Assignee: Sony Corporation
    Inventors: Nanako Kato, Toshifumi Wakano
  • Patent number: 9992436
    Abstract: In various embodiments, methods and related apparatuses for scaling down pixel sizes in quantum film-based image sensors are disclosed. In one embodiment, an image sensor circuit is disclosed that includes circuit includes an optically sensitive layer, a first pixel having a first electrode coupled to a first region of optically sensitive layer, a second pixel having a second electrode coupled to a second region of optically sensitive layer, and a readout circuit having at least one transistor that is shared among the first pixel and the second pixel. In a first time interval, the transistor is used in a readout of a signal related to illumination of the first pixel over an integration period. During a second time interval, the transistor is used in a readout of a signal related to illumination of the second pixel over an integration pixel. The signals thusly read constitute a time-domain multiplexed (TDM) signal.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: June 5, 2018
    Assignee: INVISAGE TECHNOLOGIES, INC.
    Inventors: Emanuele Mandelli, Dario Clocchiatti, Aurelien Philippe Bouvier
  • Patent number: 9979912
    Abstract: An image sensor may include an array of pixels having an active pixel. The active pixel may generate image signals in response to incident light. The image sensor may also include a power supply and booster circuitry. The power supply may provide a powers supply voltage signal, which has a first noise component, to the active pixel. The booster circuitry may provide a control signal, which has a second noise component that is the inverted version of the first noise component, to the active pixel. The control signal with the second noise component may be used to reject the first noise component, which is an unwanted noise component (e.g., power supply noise). The booster circuitry may include an operational amplifier, capacitors, and switches coupled to two input terminals and one output terminal of the operational amplifier in various configurations.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: May 22, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Kazuhisa Suzuki
  • Patent number: 9973714
    Abstract: Disclosed is an imaging device and method capable of obtaining an image with exposure appropriate for each sample when a plurality of samples are collectively imaged. For performing imaging using an imaging device configured to divide an imaging area into a plurality of partial areas, to perform imaging for each partial area, a proper exposure time is calculated for each partial area based on an image signal, a positive integer multiple of the maximum value among the calculated proper exposure times is set as a total imaging time, an imaging frequency is set for each partial area using a value obtained by dividing the total imaging time by the calculated proper exposure time, imaging with the calculated proper exposure time of the partial area is successively and repeatedly performed by the set imaging frequency, and each image successively imaged is simply added or is added and averaged.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: May 15, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Yasutake Tanaka, Yasunori Ohta
  • Patent number: 9961282
    Abstract: For each of the signal corresponding to a signal of a photoelectric converting unit being only a part of an effective pixel and the signal corresponding to a signal obtained by adding signals of a plurality of photoelectric converting units, the difference corresponding to the signal corresponding to the signal obtained by adding the signals of the plurality of photoelectric converting units of a light-shielded pixel.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: May 1, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kazuo Yamazaki
  • Patent number: 9961279
    Abstract: A pixel circuit includes a transfer transistor coupled between a photodiode and a floating diffusion to selectively transfer image charge accumulated in the photodiode to the floating diffusion. A selection circuit is coupled to select one of a first transfer control signal, a second transfer control signal, or a third transfer control signal to control the transfer transistor. The selection circuit is coupled to output the first transfer control signal in response to a precharge enable signal during a read out operation of a different row than a row in which the transfer transistor is included, to output the second transfer control signal in response to a sample enable signal during a read out operation of the row in which the transfer transistor is included, and output the third transfer control signal to partially turn on the transfer transistor during an idle state of the pixel circuit.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: May 1, 2018
    Assignee: OmniVision Technologies, Inc.
    Inventors: Rui Wang, Tiejun Dai
  • Patent number: 9948879
    Abstract: An image processing apparatus for processing signals read out from an image sensor that includes a plurality of photoelectric conversion portions for each of a plurality of micro-lenses, and can read out signals for each row selectively by either an addition readout operation, or a divisional readout operation. The image processing apparatus includes a first processing unit to perform offset correction on signals of a first row read out by the addition readout operation using signals in two or more rows that were read out by the addition readout operation before the first row, and a second processing unit to perform offset correction on signals of a second row read out by the divisional readout operation using the signals of the second row and a predetermined value.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: April 17, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichi Hirai
  • Patent number: 9912885
    Abstract: Provided is an image pickup apparatus capable of reading out and outputting pixel data of a partial area of a rolling shutter type image sensor. The image pickup apparatus includes: a readout condition setter configured to set a readout condition from the image sensor; a charge time setter configured to set charge time of the image sensor; a controller configured to control charging of the image sensor and readout from the image sensor so as to achieve constant charge time irrespective of the readout condition; and an image signal output unit configured to output a pixel signal read out by the controller.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: March 6, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shingo Isobe
  • Patent number: 9900534
    Abstract: A signal based on a pixel signal of a first pixel sampled by a capacitor element is held by a signal holding unit with a switch left turned on.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: February 20, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hideo Kobayashi, Kazuo Yamazaki, Kei Ochiai, Masaki Sato
  • Patent number: 9832400
    Abstract: An image sensor includes a pixel array unit including an active pixel area including active pixels, a first dark area including first dark pixels, and a second dark area including second dark pixels, an offset extractor configured to extract a final dark offset value, and a corrector configured to correct pixel data values of the active pixels based on the final dark offset value. The offset extractor extracts a per-column dark offset value, a global dark offset value, a per-row average, and a per-row noise value, selects one of the extracted per-column dark offset value and global dark offset value, and extracts the final dark offset value from the per-row noise value and either the per-column dark offset value or the global dark offset value.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: November 28, 2017
    Assignee: Dongbu HiTek Co., Ltd.
    Inventor: Yong In Han
  • Patent number: 9774805
    Abstract: An image pickup apparatus capable of obtaining a smooth video image and of reducing deterioration in the vertical resolution and an image stabilization performance. An image pickup device has a valid pixel area for obtaining an image signal, an optical black area for an optical black correction, and an amplifier unit that amplifies an output from the pixel area and outputs an image signal. A gain adjustment unit adjusts gain of the image signal. A reading control unit changes a gain value in the amplifier unit, changes the numbers of lines in the areas, and performs reading control of the image pickup device, when a control gain value in the gain adjustment unit exceeds a reference value. A change unit changes a time constant of a correction filter used for the optical black correction when the control gain value exceeds the specified reference value.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: September 26, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Masaaki Kano
  • Patent number: 9769404
    Abstract: A solid-state image sensor has a pixel array and a processor configured to process a signal from the pixel array, the pixel array including a light-receiving pixel having first and second photoelectric converters and a light-shielded pixel having third and fourth photoelectric converters. The processor outputs (a) a pixel signal corresponding to charges of the first photoelectric converter, (b) an added pixel signal corresponding to a sum of charges of the first photoelectric converter and charges of the second photoelectric converter, and (c) an added reference signal corresponding to a sum of charges of the third photoelectric converter and charges of the fourth photoelectric converter, and does not output (d) a reference signal corresponding to charges of the third photoelectric converter and a reference signal corresponding to charges of the fourth photoelectric converter.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: September 19, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuki Ohshitanai
  • Patent number: 9746566
    Abstract: The present invention relates to the correction of X-ray image information, e.g. the correction of X-ray image information regarding persistent currents in X-ray detector elements. X-ray detectors may be embodied as photoconductors with ohmic contacts, which output a photo current depending on the energy and amount of photons impinging on a respective photoconductor pixel. Such photoconductors may exhibit a photoconductive gain, i.e. the measured current when irradiated by X-ray is higher than the current, which would result from impinging photons only generating electron-hole pairs. To compensate for photoconductive gain a method (50) for image correction of X-ray image information is provided, comprising receiving (52) readout information of an X-ray detector element (14), wherein the readout information is dependent on impinging X-radiation (20) generating a photo current and compensating (54) the readout information for a photoconductive gain employing compensation information.
    Type: Grant
    Filed: September 29, 2013
    Date of Patent: August 29, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Christoph Herrmann
  • Patent number: 9728574
    Abstract: A CMOS image sensor has a pixel array provided with a plurality of unit pixels arranged in a matrix shape of rows and columns. Each of the unit pixels includes a photocharge generation means for generating photocharges by absorbing an external light; and a sensing node for receiving the photocharges transferred from the photocharge generation means, wherein the sensing node of the unit pixel in a previous scan line is shared with a sensing node of a unit pixel in a current scan line in response to a line select signal of the current line.
    Type: Grant
    Filed: January 3, 2014
    Date of Patent: August 8, 2017
    Assignees: ASML NETHERLANDS B.V., CARL ZEISS AG
    Inventor: Oh-Bong Kwon
  • Patent number: 9692996
    Abstract: A sensor for suppressing a background signal is provided. The sensor includes: a pixel array that detects a signal by using a plurality of pixels; an accumulator that converts a differential signal between two signals detected from an arbitrary pixel of the pixel array at predetermined times into a digital signal and accumulates the digital signal; and a digital memory that stores the accumulated digital signal.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: June 27, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-hyuk Choi, Jung-soon Shin
  • Patent number: 9681026
    Abstract: A method for performing lens shading compensation is provided. The method includes: receiving at least two series of source images of different exposure settings; performing first lens shading compensation on the at least two series of source images respectively; analyzing luminance distribution of the at least two series of compensated source images; composing a series of HDR images from the at least two series of compensated source images according to the luminance distribution; performing second lens shading compensation on the series of HDR image; and performing tone mapping on the series of compensated HDR images. A system for performing lens shading compensation is also provided.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: June 13, 2017
    Assignee: HTC Corporation
    Inventor: Wen-Chun Feng
  • Patent number: 9666626
    Abstract: An image pickup device which suppresses an increase in chip area of peripheral circuits without degrading the performance of a pixel section and makes it possible to prevent costs from being increased. The image pickup device includes a first semiconductor substrate and a second semiconductor substrate. A pixel section includes photo diodes each for generate electric charges by photoelectric conversion, floating diffusions each for temporarily storing the electric charges generated by the photo diode, and amplifiers each connected to the floating diffusion, for outputting a signal dependent on a potential of the associated floating diffusion. Column circuits are connected to vertical signal lines, respectively, for performing predetermined processing on signals output from the pixel section to vertical signal lines.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: May 30, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takafumi Kishi
  • Patent number: 9635290
    Abstract: The present invention provides a technique for achieving higher picture quality of a captured image by reducing noise which occurs at the time of resetting in a solid-state image sensing device and the like. A pixel array in a solid-state image sensing device includes a plurality of pixels and includes an OB pixel region and an effective pixel region. The solid-state image sensing device has a signal processing unit outputting a pixel signal of each of the pixels in the effective pixel region on the basis of the signal level of a signal output from each of the pixels. The solid-state image sensing device obtains a signal without applying a reset signal to each of the pixels in the OB pixel region, obtains the difference between the signal and a signal of a pixel in the effective pixel region, and outputs an image signal.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: April 25, 2017
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Shunsuke Okura, Fukashi Morishita
  • Patent number: 9626935
    Abstract: Embodiment relate to a display panel that modulates 3D image data based on pixel data of adjacent lines. The display panel includes data lines, gate lines, and a plurality of pixels; a data modulation unit. The modulation unit modulates kth pixel data of a jth line in 3D image data based on the kth pixel data of the jth line and kth pixel data of a line adjacent to the jth line. The data driving circuit converts the modulated 3D image data into analog data voltages and outputs the analog data voltages to the data lines. A gate driving circuit sequentially outputs gate pulses to the gate lines.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: April 18, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: Jeongki Lee, Joonyoung Park, Jaewoo Park, Dongjun Choi, Eunkyung Seong
  • Patent number: 9601537
    Abstract: An image pickup device which suppresses an increase in chip area of peripheral circuits without degrading the performance of a pixel section and makes it possible to prevent costs from being increased. The image pickup device includes a first semiconductor substrate and a second semiconductor substrate. A pixel section includes photo diodes each for generate electric charges by photoelectric conversion, floating diffusions each for temporarily storing the electric charges generated by the photo diode, and amplifiers each connected to the floating diffusion, for outputting a signal dependent on a potential of the associated floating diffusion. Column circuits are connected to vertical signal lines, respectively, for performing predetermined processing on signals output from the pixel section to vertical signal lines.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: March 21, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takafumi Kishi
  • Patent number: 9554033
    Abstract: A focus detection apparatus comprises a line sensor including a photoelectric conversion element and an integrating capacitor, a storage unit configured to store information concerning a defective pixel, a first comparison unit configured to compare a signal from the defective pixel with a predetermined threshold, a switching unit configured to switch between a first accumulation mode and a second accumulation mode, and a control unit configured to control the switching unit so as to set the line sensor in the first accumulation mode if the first comparison unit determines that a signal from the defective pixel is not more than the predetermined threshold and set the line sensor in the second accumulation mode if the first comparison unit determines that a signal from the defective pixel is larger than the threshold.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: January 24, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Shu, Takashi Ichimiya
  • Patent number: 9538093
    Abstract: An image processing method and apparatus are provided. The image processing method includes collecting at least two exposure frames with different brightness in a same scene during different exposure time; combining, for each exposure frame, a raw data unit arranged repeatedly in the exposure frame to obtain first brightness data after the combining; acquiring a correction parameter of all exposure frames according to all first brightness data and performing weighting processing on all the exposure frames by using the correction parameter to obtain a high dynamic range (HDR) image of corrected raw data. The foregoing method can resolve a problem in the prior art that colors, brightness, and contrast of an image obtained from Raw data are severely distorted.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: January 3, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Hai Chen, Yan Zhang
  • Patent number: 9492129
    Abstract: Automatic triggering of an intraoral x-ray sensor used in a dental x-ray imaging system. The intraoral sensor has an array of pixels. The array of pixels has a plurality of lines of pixels, and each of the pixels generates an electrical signal correlated to x-ray radiation that impinges that pixel. An electronic control unit is connected to the intraoral sensor to receive electric signals from the array of pixels. The electronic control unit destructively reads pixel clusters in one or more of the plurality of lines of pixels. The electronic control unit is configured to generate a dose-correlated signal based on the signals from each of the pixel clusters in each of the one or more lines of pixels and initiate capture of an image generated with information from each of the pixels in the array of pixels, when the combined signal exceeds a predetermined threshold.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: November 15, 2016
    Assignee: DENTAL IMAGING TECHNOLOGIES CORPORATION
    Inventors: Uwe Zeller, Doug Golay
  • Patent number: 9491382
    Abstract: An imaging device includes an effective pixel region outputting an effective pixel signal, a first shielded pixel region outputting a shielded pixel signal before the effective pixel signal is output, and a second shielded pixel region outputting a shielded pixel signal after the effective pixel signal has been output. In the device, in a steady state, frame clamping is performed using a clamping reference value generated from the pixel signals of the second shielded pixel region. A frame in a transition state in which the optical black signal level of the imaging device changes is subjected to frame clamping using a clamping reference value generated from the pixel signals of the first shielded pixel region.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: November 8, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Tadayuki Inoue
  • Patent number: 9456123
    Abstract: A mobile electronic device application uses various hardware parameters for operation. The application leverages calibration data from other users to determine what the parameters should be for the particular device model on which the application is installed. The application queries a cloud-based data store by sending the model and a hardware-variable parameter to the data store. If a value for the parameter is available in the data store, the application will receive it from the data store and use it in operation. If the value is not available, the application will prompt the user to calibrate the application. The application will use the calibration results to identify a setting, and it will send the setting to the data store for use by other instances in which the application is installed on the same model device.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: September 27, 2016
    Assignee: Xerox Corporation
    Inventors: Phillip J. Emmett, Lina Fu, Raja Bala
  • Patent number: 9456155
    Abstract: An image processing apparatus obtains a picked-up image which is output from an image pickup element which includes a microlens array for obtaining the picked-up image including ray directional information of an object image formed by a photographing optical system, generates a reconstruction image by reconstructing the obtained picked-up image on the basis of the ray directional information, and detects a defect pixel of the generated reconstruction image.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: September 27, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hirokazu Kobayashi, Nobuhiro Takeda
  • Patent number: 9456154
    Abstract: An imaging apparatus including: a solid-state imaging device including pixels arranged in rows and columns, the device including: an OB pixel unit including rows of light-shielding pixels among the pixels; and a valid pixel unit including pixels allowing light from the subject to enter among the pixels; an exposure control unit which exposes the second pixel unit; a read line selecting unit which sequentially selects one or more pixel rows of the OB pixel unit, at different timings during exposure of the valid pixel unit, and causes each of pixels of the one or more pixel rows to output a pixel signal; and a dark charge measuring unit which measures the quantity of dark charge due to dark current of the device using current ones of pixel signals, each time pixel signals are output from the OB pixel unit through the selection by the read line selecting unit.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: September 27, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Yusuke Okada
  • Patent number: 9432603
    Abstract: An imaging apparatus, which includes an imaging device having a plurality of image sensors, is configured to receive light incident on the imaging device, obtain an output voltage based the received light, and generate an image based on the output voltage. The plurality of image sensors have an aperture pixel region that accumulates and outputs the charges generated based on the incident light and a shielded optical black region. The imaging device performs a skipping operation for arbitrarily and non-sequentially selecting a read row. By performing an offset correction of a step amount produced during the non-sequential reading due to the skip operation, the step resulting from the skip reading can be corrected.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: August 30, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Mie Ishii
  • Patent number: 9426398
    Abstract: A solid-state image sensor has a pixel array and a processor configured to process a signal from the pixel array, the pixel array including a light-receiving pixel having first and second photoelectric converters and a light-shielded pixel having third and fourth photoelectric converters. The processor outputs (a) a pixel signal corresponding to charges of the first photoelectric converter, (b) an added pixel signal corresponding to a sum of charges of the first photoelectric converter and charges of the second photoelectric converter, and (c) an added reference signal corresponding to a sum of charges of the third photoelectric converter and charges of the fourth photoelectric converter, and does not output (d) a reference signal corresponding to charges of the third photoelectric converter and a reference signal corresponding to charges of the fourth photoelectric converter.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: August 23, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuki Ohshitanai